CodeHS is an interactive online learning platform offering computer science and programming instruction for schools and individual learners.
CodeHS is focused on spreading access to and knowledge of computer science by offering online instructional materials supported by remote tutors.
Explanation:
Downloading an image from a website on the internet.
- Right-click the image.
- Choose the command Save Picture As. The command might be different in browsers other than Internet Explorer.
- Use the Save Picture dialog box to find a location to save the picture. You can rename the picture as it's saved to your computer's storage system
- Click the Save button.
Download an image of Karel the dog from the URL
- Create a folder in your laptop
- Place your text file of images URL in the folder.
- cd to that folder.
- Use wget -i images.txt.
- You will find all your downloaded files in the folder.
How your computer finds the CodeHS server, requests information from the server, and receives it.
- When you enter an URL into the address bar of browser, browser will send the domain to a server call DNS to convert the domain into IP address.
- For example: google dot com will be convert into 113.171.253.224
- Next, the browser will send your request to that IP.
- All your sent data will be divided into packages, each package contains your IP address.
- That is the reason why server know who it will send the response.
Hello, you haven't provided the programing language in which you need the code, I'll explain how to do it using Python, and you can follow the same logic to make a program in the programing language that you need.
Answer:
1. # -*- coding: utf-8 -*-
2. #Python
3. class Calculator:
4. def add(self):
5. print(a + b)
6. def sub(self):
7. print(a - b)
8. def mul(self):
9. print(a * b)
10. def div(self):
11. print(a / b)
12.
13. obj = Calculator()
14. choice = 1
15. while choice != 0:
16. a = int(input("\nEnter first number: "))
17. b = int(input("Enter first number: "))
18.
19. print("\n0. EXIT")
20. print("1. DIVISION")
21. print("2. ADDITION")
22. print("3. SUBTRACTION")
23. print("4. MULTIPLICATION")
24.
25. choice = int(input("\nEnter your choice: "))
26. if choice == 1:
27. obj.div()
28. elif choice == 2:
29. obj.add()
30. elif choice == 3:
31. obj.sub()
32. elif choice == 4:
33. obj.mul()
34. else:
35. break
Explanation:
- From lines 1 to 12 we define the object with four methods, addition, subtraction, multiplication, and division. Each method contains the operation between two variables inside a print function
- On line 13 we instantiate our class
- On line 14 we declare the variable choice that is going to store the operation that the user wants to perform
- On line 15 we declare a while loop, this is going to keep running the program until the user wants to exit
- From line 16 to 18 we ask the user to enter two numbers
- From line 19 to 24 we print the possible operation, assigning a number for each operation, this indicates to the user what number to press for what operation
- On line 25 we ask the user for the operation
- From lines 26 to 35 we check the user input an accordingly we call the corresponding method to performs the operation
send attached file with it
Answer:
The given statement is false statement.
Explanation .
- The assignment is assigning the value to the variable or we can say that it will also be used to initialize the variable The "=" is the symbol of the assignment operator.
int r=90, The value of variable 90 is assigned to 90.
- The associativity, of assignment, is always right to left which means The right-hand side is firstly evaluated then it will be assigned in left-hand side variable or expression.
